Comparing Land Change Solutions - 2nd Grade Science
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Which solution best protects loose soil on a windy day: a fence/windbreak or spraying water once?
Which solution best protects loose soil on a windy day: a fence/windbreak or spraying water once?
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A fence or windbreak. Barriers block wind continuously, unlike temporary water spray.
A fence or windbreak. Barriers block wind continuously, unlike temporary water spray.
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Which solution best slows water in a garden: a small ditch to guide water or a smooth hard surface?
Which solution best slows water in a garden: a small ditch to guide water or a smooth hard surface?
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A small ditch to guide water. Ditches channel water slowly instead of letting it rush freely.
A small ditch to guide water. Ditches channel water slowly instead of letting it rush freely.
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Which option is the best general choice to prevent erosion: keeping land covered with plants or removing vegetation?
Which option is the best general choice to prevent erosion: keeping land covered with plants or removing vegetation?
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Keeping land covered with plants. Plants provide year-round protection from both wind and water.
Keeping land covered with plants. Plants provide year-round protection from both wind and water.
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Which agent of erosion is most likely when you see sand dunes forming?
Which agent of erosion is most likely when you see sand dunes forming?
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Wind. Wind carries sand particles to form these mounds.
Wind. Wind carries sand particles to form these mounds.
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What is the purpose of placing rocks or sandbags along a shoreline?
What is the purpose of placing rocks or sandbags along a shoreline?
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To block waves and reduce erosion. These barriers absorb wave energy before it hits shore.
To block waves and reduce erosion. These barriers absorb wave energy before it hits shore.
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Which solution best reduces runoff on a hill: terraces (step-like levels) or a smooth steep slope?
Which solution best reduces runoff on a hill: terraces (step-like levels) or a smooth steep slope?
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Terraces (step-like levels). Steps slow water flow and reduce its erosive power.
Terraces (step-like levels). Steps slow water flow and reduce its erosive power.
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Which option best reduces erosion during heavy rain: mulch/ground cover or exposed soil?
Which option best reduces erosion during heavy rain: mulch/ground cover or exposed soil?
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Mulch or ground cover. Mulch absorbs rain impact and slows water flow.
Mulch or ground cover. Mulch absorbs rain impact and slows water flow.
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Which agent of erosion is most likely when you see soil carried downstream?
Which agent of erosion is most likely when you see soil carried downstream?
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Water. Rivers and streams transport soil particles downstream.
Water. Rivers and streams transport soil particles downstream.
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Which is better for preventing erosion on a playground slope: planting shrubs or leaving dirt bare?
Which is better for preventing erosion on a playground slope: planting shrubs or leaving dirt bare?
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Planting shrubs. Shrub roots hold soil while leaves block rain impact.
Planting shrubs. Shrub roots hold soil while leaves block rain impact.
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Which solution best slows water erosion on a sloped hill: planting grass or removing plants?
Which solution best slows water erosion on a sloped hill: planting grass or removing plants?
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Planting grass. Roots anchor soil and absorb water that would cause runoff.
Planting grass. Roots anchor soil and absorb water that would cause runoff.
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Which solution best slows wind erosion in a farm field: a windbreak of trees or bare ground?
Which solution best slows wind erosion in a farm field: a windbreak of trees or bare ground?
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A windbreak of trees. Trees block wind from picking up and moving soil particles.
A windbreak of trees. Trees block wind from picking up and moving soil particles.
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Which solution best slows water near a stream bank: rocks along the bank or removing rocks?
Which solution best slows water near a stream bank: rocks along the bank or removing rocks?
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Rocks along the bank. Rocks absorb water energy and protect the bank from washing away.
Rocks along the bank. Rocks absorb water energy and protect the bank from washing away.
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What is a barrier used to block or slow moving water called?
What is a barrier used to block or slow moving water called?
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A dam or barrier. These structures control water flow and prevent flooding.
A dam or barrier. These structures control water flow and prevent flooding.
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Which option best prevents soil from washing away: plant roots holding soil or smooth pavement?
Which option best prevents soil from washing away: plant roots holding soil or smooth pavement?
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Plant roots holding soil. Roots create a network that grips and stabilizes soil.
Plant roots holding soil. Roots create a network that grips and stabilizes soil.
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What is the main way plant roots help prevent erosion?
What is the main way plant roots help prevent erosion?
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They hold soil in place. Roots form underground networks that grip soil particles.
They hold soil in place. Roots form underground networks that grip soil particles.
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